{"id":"F2019L00082","name":"AD/CESSNA 208/18 Amdt 1 Emergency Power Lever Shear Wire","slug":"ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":98705,"registerId":"commonwealth-F2019L00082-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Textron Aviation (Cessna) 208 Series Aer","sectionType":"part","heading":"Textron Aviation (Cessna) 208 Series Aeroplanes","content":"# Textron Aviation (Cessna) 208 Series Aeroplanes\n\n| AD/CESSNA 208/18 Amdt 1 | Emergency Power Lever Shear Wire | 3/2019 |\n| ----------------------- | -------------------------------- | ------ |\n\n```html\n

Applicability:

Textron Aviation (Cessna) 208 and 208B model aircraft approved for operation under regulation 174B(2)(d) or regulation 175A(1)(d) of the Civil Aviation Regulations 1988, (“an Approved Single Engine Turbine Powered Aircraft (ASETPA) approval”), and within the following serial number ranges:

Model

Serial Numbers

Cessna 208

20800001 through to 20800350

Cessna 208B

208B0001 through to 208B0919

Requirement:

Install a frangible/shear wire that ties the Emergency Power Lever (EPL) to the pedestal cover in accordance with Cessna Service Bulletin (SB) CAB01-15 as in force at the commencement of this AD.

Note 1: The aircraft maintenance manual details actions to be followed when the frangible/shear wire is found broken.

Compliance:

Unless previously accomplished, within 6 months from the effective date of this Directive.

Note 2: Compliance with AD/CESSNA 208/18 constitutes compliance with this AD.

This AD commences on 8 February 2019.

Background:

Following an incident involving the use of the EPL, the Australian Transport Safety Bureau recommended the fitment of frangible/shear wire between the pedestal and the EPL. This will help ensure appropriate maintenance actions when the EPL has been used for any reason.

\n```\n\n| | This Amendment is issued to align the AD applicability with that of Cessna SB CAB01-15 as in force at the commencement of this AD. |\n| --- | ---------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.jpeg)\n\nPieter van Dijk \nDelegate of the Civil Aviation Safety Authority\n\n29 January 2019","sortOrder":0},{"sectionNumber":"AD/CESSNA 208/18 Amdt 1","sectionType":"part","heading":"AD/CESSNA 208/18 Amdt 1","content":"## AD/CESSNA 208/18 Amdt 1","sortOrder":1},{"sectionNumber":"Emergency Power Lever Shear Wire","sectionType":"part","heading":"Emergency Power Lever Shear Wire","content":"## Emergency Power Lever Shear Wire","sortOrder":2},{"sectionNumber":"3/2019","sectionType":"part","heading":"3/2019","content":"## 3/2019","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Amendment 1 maintains the original purpose of the AD (safety modification for EPL monitoring). The amendment merely aligns the serial number applicability with the manufacturer's service bulletin, without expanding the substantive requirements or safety objectives."},"complexity_factors":["Single, specific mechanical requirement (install one wire)","Limited applicability — only two aircraft models with defined serial number ranges","No nested exceptions or conditional logic","Only 2 defined regulatory references (CAR 174B(2)(d) and 175A(1)(d))","Clear compliance pathway (reference to Cessna Service Bulletin CAB01-15)","Simple temporal compliance (6 months from commencement)"],"plain_english_summary":"This CASA Airworthiness Directive mandates installing a frangible (shear) wire linking the Emergency Power Lever to the pedestal cover on specified Cessna 208/208B Caravans approved for single‑engine turbine passenger ops. The wire provides a tamper‑evident indication if the EPL has been used, prompting required maintenance and preventing aircraft being flown with possible engine damage or incorrect settings. Compliance was required within six months; Amendment 1 simply updates covered serial numbers."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment aligns the AD's applicability with Cessna Service Bulletin CAB01‑15 'as in force' at the AD's commencement, thereby adjusting which aircraft/serial numbers and ASETPA approvals are captured. The required action (install shear wire) and the six‑month compliance period remain in force; the change is limited to which aircraft fall within the AD's scope (see 'Applicability' and amendment note)."},"complexity_factors":["Narrow applicability tied to specific models, serial‑number ranges and ASETPA approvals — requires operators to check airframe serials and approval status (see 'Applicability').","Single, discrete engineering action (install frangible/shear wire) reduces procedural complexity (see 'Requirement').","Dependency on an external service bulletin 'as in force' introduces versioning/interpretation risk about which SB revision applies (see 'Requirement' and amendment note).","Short, fixed compliance window (6 months) creates scheduling and logistical pressure for operators and maintenance organisations (see 'Compliance').","Reference to aircraft maintenance manual for follow‑up actions when wire is broken shifts procedural detail to maintenance documentation (see Note 1).","Regulatory amendment solely aligns applicability with the SB, so administrative tracking of the amendment is required but no new technical tasks were imposed (see amendment note)."],"plain_english_summary":"Requires fitting a frangible/shear wire that ties the Emergency Power Lever (EPL) to the pedestal cover on specified Textron (Cessna) 208 and 208B single‑engine turbine aircraft (listed serial ranges), using Cessna Service Bulletin CAB01‑15. Operators must complete the fitment within six months; the AD follows an ATSB recommendation after an incident. Operators bear the cost and must inspect and follow maintenance‑manual actions if the wire is broken; the regulator determines which aircraft and the compliance timeframe."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire","history":"/api/acts/ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire/history","analysis":"/api/acts/ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire/analysis","conflicts":"/api/acts/ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire/conflicts","importantCases":"/api/acts/ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire/important-cases","documents":"/api/acts/ad-cessna-208-18-amdt-1-emergency-power-lever-shear-wire/documents"}}